Chemistry, 08.11.2020 02:20, WinterStrikesBack

14. Calculate the energy of a wave with the wavelength of 4.80 x 105 nm. What type of radiation is this?

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answered: jasminevargasolea

The energy of the wave is 4.14 × 10⁻²² J

The radiation is an infrared radiation because its wavelength is within the infrared range

From the question,

We are to determine the energy of the wave that has a wavelength of 4.80 × 10⁵ nm.

From the formula

$E = h\nu$

Where E is the energy

h is Planck's constant (h=6.626 × 10⁻³⁴ Js)

and $\nu$ is the frequency

But frequency, $\nu$ is given by

$\nu =\frac{c}{\lambda}$

Where c is the speed of light (c = 3.0 × 10⁸ m/s)

and λ is the wavelength

Then, we can write that

$E =\frac{hc}{\lambda}$

From the question

λ = 4.80 × 10⁵ nm = 4.80 × 10⁵ × 10⁻⁹ m

λ = 4.80 × 10⁻⁴ m

∴ Energy of the wave is

$E = \frac{6.626 \times 10^{-34} \times 3.0 \times 10^{8} }{4.80 \times 10^{-4} }$

$E = \frac{19.878 \times 10^{-26} }{4.80 \times 10^{-4} }$

$E = 4.14125 \times 10^{-22} \ J$

E ≅ 4.14 × 10⁻²² J

Hence, the energy of the wave is 4.14 × 10⁻²² J

The radiation is an infrared radiation because its wavelength is within the infrared range

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answered: bankskry

4.1 * 10^-22 J

The wave belongs to the infra red portion of the electromagnetic spectrum.

Explanation:

From the formula;

E = hc/λ

We know that;

h= plank's constant = 6.6 * 10^-34 Js

c= speed of light = 3 * 10^8 m/s

λ = wavelength of the wave = 4.80 x 10^5 nm or 4.80 x 10^-4 m

Hence;

E= 6.6 * 10^-34 * 3 * 10^8/ 4.80 x 10^-4

E= 4.1 * 10^-22 J

The wave belongs to the infra red portion of the electromagnetic spectrum.

answered: Guest

Answer: abeexplanation:

1. the question asks the most appropriate, which seems to rule out "all of the above." your choice appears to be the correct one.

2. the protocol described is good for identifying correlation, but not cause and effect. for cause/effect, you need to devise a protocol that will assign the treatment (or not) to groups that have essentially the same "demographics" with respect to all the other variables. your choice regarding control group seems appropriate. random assignment of treatment (choice d) may be appropriate also. (i think you can argue that b and d are just different descriptions of the same method.)

3. d will randomize the birds, but may not guarantee there are 10 in each group. e will do both, so seems the better choice.

comment on question 2

based on the problem statement, it seems clear that confident, attentive drivers are more likely to use daytime running lights. so, the protocol might need to be devised in such a way that the lights would be turned on or off without the driver's knowledge. (an attentive driver will figure it out.) assigning a confident, attentive driver to a group required to drive without running lights might mess with his/her confidence and attentiveness. you don't want your experiment to do that. (nor do you want the experiment to subject a driver to greater risk of accident as a consequence of driving without running lights.) experiments involving human safety are always problematic.

answered: Guest

c)red bank

explanation:

red bank is a borough in monmouth county, new jersey, incorporated in 1908 and located on the navesink river, the area's original transportation route to the ocean and other ports.